vx6000 reception

I recently purchased two vx6000 phones to replace my 2235 kyocera phones. I am very surprised with my the reception. With the kyocera I had no problem with calls even with 1 bar of signal. Now even with 2-4 bars I notice my calls sound garbled like I'm underwater on both phones. Is it because it is not tri-mode like the kyocera? HELP I only have 7 more days for my return. Will the new Samsung be tri-mode with or without a camera???